Compilare: main.cpp: In function 'std::__cxx11::string merget(std::__cxx11::string, std::__cxx11::string)': main.cpp:32:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p == a.size()) { ~~^~~~~~~~~~~ main.cpp:35:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] } else if(p2 == b.size()){ ~~~^~~~~~~~~~~